1. The problem statement, all variables and given/known data Why does it happen? 2. Relevant equations 3. The attempt at a solution I read that Bremsstrahlung happens because a charged particle loses kinetic energy as it swings past a nucleus, therefore a photon is released to conserve energy. However, since the electric force is conservative, as an electron approaches from infinity, swings past, and leaves to infinite, the work done on it is zero. However, this leads me to a contradiction because writing conservation of energy: E(i) = E(f) --> E(i)=E(f) + E(photon) where energy isn't conserved. This seems to lead to the explanation that the electron lost energy because it emitted a photon, but this still does not answer the original question of why the photon was emitted in the first place. I know that it has something to do with charged particles being accelerated, but as long as the work done of them is zero their total energy shouldn't change so I am confused as to where the photon comes into play.